data_9000048
_publ_section_title
;
 On parkerite and shandite and the crystal structure of Ni3Pb2S2
;
_journal_name_full               'American Mineralogist'
_journal_page_first              425
_journal_page_last               439
_journal_volume                  35
_journal_year                    1950
_chemical_formula_sum            'Ni3 Pb2 S2'
_chemical_name_mineral           Shandite
_space_group_IT_number           166
_symmetry_space_group_name_Hall  '-P 3* 2'
_symmetry_space_group_name_H-M   'R -3 m :R'
_cell_angle_alpha                60
_cell_angle_beta                 60
_cell_angle_gamma                60
_cell_length_a                   5.576
_cell_length_b                   5.576
_cell_length_c                   5.576
_cell_volume                     122.590
_exptl_crystal_density_diffrn    8.867
_[local]_cod_cif_authors_sg_H-M  'R -3 m'
_[local]_cod_chemical_formula_sum_orig 'Pb2 Ni3 S2'
_cod_database_code               9000048
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-z,-y
-z,-x,-y
y,x,z
y,z,x
-z,-y,-x
-x,-y,-z
x,z,y
z,x,y
-y,-x,-z
-y,-z,-x
z,y,x
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Pb1 0.00000 0.00000 0.00000
Pb2 0.50000 0.50000 0.50000
Ni 0.50000 0.00000 0.00000
S 0.28500 0.28500 0.28500
